pfSense

                        else

                                $wanip = get_interface_ip($dnsupdate['interface']);

			$wanipv6 = get_interface_ipv6($dnsupdate['interface']);

			$cacheFile = "{$g['conf_path']}/dyndns_{$dnsupdate['interface']}_rfc2136_" . escapeshellarg($dnsupdate['host']) . "_{$dnsupdate['server']}.cache";

			$currentTime = time();

				/* Update IPv4 if we have it. */

				if (is_ipaddrv4($wanip)) {

					if (($wanip != $cachedipv4) || (($currentTime - $cacheTimev4) > $maxCacheAgeSecs) || $forced) {

						$upinst .= "update delete {$dnsupdate['host']}. A\n";

						$upinst .= "update add {$dnsupdate['host']}. {$dnsupdate['ttl']} A {$wanip}\n";

						$notify_text .= sprintf(gettext("DynDNS updated IP Address (A) for {$dnsupdate['host']} on %s (%s) to %s"), convert_real_interface_to_friendly_descr($if), $if, $wanip) . "\n";